Territory



(No Model.)

' S. H. GILSON.

@VBRHEAD INSULATOR.

No. 396,334. Patented Jan. l5, 1889.

N. FETKRA Phnm-Uthogmpmn wnhingim D. C4

SAMUEL H. GILSON, OF SALT LAKE aTEn'T CITY, UTAII TERRITORY.

OVERHEAD :nent/arca.

SPECIFICATION forming part of Letters Patent No. 396,334,

dated January 15, 1889.

Application tiled September 28, 1888. Serial No. 286,700. (No model.)

To all whom, it may concern.-

Be it'known that I, SAMUEL H. GiLsoN, a citizen of the United States, residing at Salt Lake Gi ty, in the county of Salt Lake and Territory of Utah, have invented certain new and i useful Improvements in Overhead Insulators; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

In my application of even date herewith I have described a new composition for overhead insulators by the employment of which insulation of a high degree of efficiency and durability is obtained at a comparatively small expense.

My present invention relates to a new article of manufacture, consisting' of an ov xrhead insulator formed or molded from the said composition.

My invention also relates to an overhead insulator having the component parts and construction hereinafter more particularly set forth.

In order to enable myinvention to be clearly understood, I have shown in the accompanying drawings a means for carrying the same into effect.

In said drawings, Figure l is a view, in cle` vation, ot an overhead insulator embodying' i my invention. Fig. 2 is a vertical himgitudinal sectie-u ot' the same. Fig. 3 is a transverse section of the same.

Referring to the drawings, A indicates the i body of the insulator, formed ofa composition consisting of twenty (20) parts of gilsonite, seventy-four (7l) parts of a granulated material-such as sand, coal-dust, broken glass or clay-and six (6) parts of oil or petroleumstill wax. The said substances are thoroughly mixed in a heated condition and the insulator molded therefrom. i

The insulator is properly shaped to be mounted and securely retained upon its support`as, for instance, by a screw-threaded recess, c, in its interior.

c indicates a groove upon the exterior surface of the insulator, )y means of which the line-wire is retained in place.

Under high temperatures, to which the insulators are sometimes exposed, as in low latitudes, or in telegraph-lines passing' through arid plains, an insulator made ofthe described composition may soften sufiicien tly to be liable to be cut into by the pressure of the line-wire or constrict-ion of the surrounding' tie-wire. At the same time, on account ot' the great et`- iicicncy and cheapness of this composition as an insulator, it is highly desirable that it should be capable of use under all conditions. I therefore prefer to provide the insulator when it is to be used under conditions which will subject it to a considerable degree of heat with a rigid protecting-band formed of a suitable material-such as iron, tin, copper, Zinc, or wood. This band indicated in the drawings at l, and is shaped to form the groove c. ly this means the line-wire is as thoroughly insulated as if such band were not employed, and at the same time the effectiveness and durability oi the insulator will not be impaired by heat.

Having thus desciibed my invention, what I claim isl. As a new article ot' manufacture, an overhead insulatorcomposed of a plastic gilsonitc composition, substantially as described.

2. As a new article of manufacture, an over- 5 head insulator composed ot' a plastic gilsoniie composition, and a surroundi ug inunhsubstantiaily as and for the purposes described.

In testimony whereof I ailix my signature in presence of two witnesses.

SAIIEI. Il. GILSON.

Vfitnesses:

FEEcUs FEReUsoN, L. B. MiLLEn. 

